diff --git a/test/openpower-pels/bcd_time_test.cpp b/test/openpower-pels/bcd_time_test.cpp
index 1f444b3..f0f3111 100644
--- a/test/openpower-pels/bcd_time_test.cpp
+++ b/test/openpower-pels/bcd_time_test.cpp
@@ -81,7 +81,7 @@
     time_tm.tm_sec = 42;
     time_tm.tm_isdst = 0;
 
-    auto timepoint = std::chrono::system_clock::from_time_t(mktime(&time_tm));
+    auto timepoint = std::chrono::system_clock::from_time_t(timegm(&time_tm));
     auto timeInBCD = getBCDTime(timepoint);
 
     EXPECT_EQ(timeInBCD.yearMSB, 0x20);
diff --git a/test/openpower-pels/private_header_test.cpp b/test/openpower-pels/private_header_test.cpp
index f7c1446..3b9e8f0 100644
--- a/test/openpower-pels/private_header_test.cpp
+++ b/test/openpower-pels/private_header_test.cpp
@@ -156,7 +156,7 @@
     time_tm.tm_isdst = 0;
 
     // Convert the above time into a uint64_t in ms since the epoch time
-    auto timepoint = std::chrono::system_clock::from_time_t(mktime(&time_tm));
+    auto timepoint = std::chrono::system_clock::from_time_t(timegm(&time_tm));
     auto timestamp = std::chrono::duration_cast<std::chrono::milliseconds>(
                          timepoint.time_since_epoch())
                          .count();